I just stumbled across another life-changing morsel of knowledge: how to enable smart sizing for remote desktop connections. It sounds like this is something that’s been around since Windows XP, but it’s relatively unknown and completely undiscoverable.
Here’s the secret: you need to create a .rdp shortcut for your connection and add the following line using your favorite text editor:
That’s it. With this miracle-line in your file, the remote desktop will scale as you resize the window. Want to know more? Go here.